27773344369 has 2 divisors, whose sum is σ = 27773344370. Its totient is φ = 27773344368.

The previous prime is 27773344301. The next prime is 27773344439. The reversal of 27773344369 is 96344337772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19687737969 + 8085606400 = 140313^2 + 89920^2 .

It is a cyclic number.

It is not a de Polignac number, because 27773344369 - 2⁷ = 27773344241 is a prime.

It is a super-2 number, since 2×27773344369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27773344969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13886672184 + 13886672185.

It is an arithmetic number, because the mean of its divisors is an integer number (13886672185).

Almost surely, 2^27773344369 is an apocalyptic number.

It is an amenable number.

27773344369 is a deficient number, since it is larger than the sum of its proper divisors (1).

27773344369 is an equidigital number, since it uses as much as digits as its factorization.

27773344369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 55.

The spelling of 27773344369 in words is "twenty-seven billion, seven hundred seventy-three million, three hundred forty-four thousand, three hundred sixty-nine".